J-B Weld High Heat Epoxy Adhesive - 4730 PSI Strength JB50197 J-B Weld High Heat Epoxy is a two-part, high-strength adhesive designed for repairs in extreme temperature environments. With a tensile strength of 4730 PSI, it withstands continuous heat up to 550oF (287oC), making it ideal for bonding and repairing engine parts, exhaust systems, heat exchangers, and other high-heat applications.